bool isVerbose() Returns whether verbosity is verbose (-v).

static setStyleDefinition(string $name,

setEmptyBarCharacter(string $char) Sets the empty bar character.

string getName() Returns the canonical name of this helper.

bool isInteractive() Is this input means interactive?

mixed getParameterOption(string|array $values, mixed $default = false, bool $onlyParams = false)

setBarWidth(int $size) Sets the progress bar width.

int doRun(InputInterface $input

int run(InputInterface $input,

setRedrawFrequency(int $freq) Sets the redraw frequency.